OK, technically it is called "silent ring mode," but it sounds like a vibrator going off in your pocket, and that is a cool thing, especially when it is some floozy on the other end. I had this one tramp call me last night to see what I was doing, so I asked her what her plans were and this is the quote I got "well, I can't leave the house until I finish off my bottle of Captain Morgans." This chick was not going to the bar until she drank an entire bottle of rum.............Sadly our paths never crossed, as I do not drink and drive and I never made it over to the bar she was at.....